Alternator???
 

Alright so my battery light came on. When the cars at idle. Its barely lit. I can only see it at night. So i replaced my battery cuz my battery was pretty old ne ways. But i have a system and when bass kicks in it gets a little bit brighter. But as soon as i put any throttle no matter if im in gear or not. It shuts off till the cars at idle again. I have access to an alternator tester and sweet deals on parts. But its a pain to take out the alternator so im trying to avoid it at all costs. Does anyone have any idea as to what the problem is? Or is it my alternator????? Any help would nbe apprecitatd!!!!! :D

Bump!!!

Sounds like you're alternator is on it's way out. Check the voltage across the battery when the car is running. I believe it should be between 13.5-14.5.